Thermal Expansion and Luminescent Properties of Triorthogermanates Ca[La.sub.2-x][Eu.sub.x][Ge.sub.3][O.sub.10]

• Published in: Physics of the solid state Vol. 60; no. 2; pp. 370 - 375
• Main Authors: Lipina, O.A, Surat, L.L, Baklanova, Ya.V, Berger, I.F, Tyutyunnik, A.P, Zubkov, V.G
• Format: Journal Article
• Language: English
• Published: Springer 01-02-2018
• Subjects: Anisotropy; Optical properties; Solid solutions; Thermal properties
• ISSN: 1063-7834; 1090-6460
• DOI: 10.1134/S1063783418020154

Solid solutions Ca[La.sub.2-x][Eu.sub.x][Ge.sub.3][O.sub.10] (x = 0.0-0.6, [increment of x] = 0.1) have been synthesized for the first time. The compounds are isostructural to Ca[La.sub.2][Ge.sub.3][O.sub.10], they crystallize in the monoclinic system, space group P[2.sub.1]/c, Z = 4. The low-temperature X-ray diffraction studies have revealed the strain anisotropy of germanate Ca[La.sub.2][Ge.sub.3][O.sub.10] crystal lattice in the temperature range 80-298 K, and the linear thermal expansion coefficients have been calculated. The optical properties of the activated phases have been studied, and the influence of the dopant concentration and the excitation wavelength on the luminescence characteristics of the synthesized compounds has been established.